Process of and apparatus for making roads.



J. D. CLARKSON. PROCESS OF AND APPARATUS FOR MAKING ROADS.

APPLICATION F|LED AUG. 28, 1915.

Patented Nov. '28, 1916. zfl -SHEETI.

J. 0. CLARK'SO N. PROCESS OF AND APPARATUS FOR MAKING ROADS.

APPLICATION FILED AUG.28. 1915.

H QUE O/wM V NE du m H 6 t nu D1 47/ mix I @Hio: new

JAMES D. CLARKSON, OFCARTHAGE, MISSOURI.

7 '0 (Ill whom it may (071((4'1'711 Be it known that I, JAMES D.CLARnsoN, a citizen of the United States, residing at tlarthage, in thecounty of Jasperand State of Missouri, have invented certain new anduseful Improvementsin Process of and Apowing: is a specification.

paratus for Making Roads, offivhich the fol- 'My invention relates to anapparatus for and a. novel method of, constructing road surfaces fromcrushed rock.

j The"invention contemplates and has reference to the production of thewearing surface of 'a. roadway, the body of wh ch is composed of a sheetor layer "ofconsiderable 20. lander or filler. and which layer or sheet,

thus filled, is compacted asby a heavy roller, and has "applied to it athin coating of fine broken stone which. upon being rolled or compacted,unites with the body of coarser material. to which it is applied andbecomes a smooth, and largely impervious, cover therefor. It is toproduce in aneco- *nomical, rapid, and satisfactory manner a roadway ofthis kind that my invention has been made.

In the accompanying drawings; Figure 1 is a sideelevation ofapparatus,embodying iny invention and by which. it may be carried out.Fig. 2 is a front view of the ap- )a-1'ati1s showing particularly thescreening and distributing devices.

In the accompanying drawing, A designates a tractor which may be of anyusual or preferred construction. It prefe ably has broad traction wheels(0 and other features of a machine of thisliind, which need not beherein described. QThe longitudinal sills. of V the apparatus extendfrom under the tractor a considerable distance in front thereof and are,arranged to support a rock crusherB; which may be of any suitable orpreferred type, a. screen or separator C for the products of .the rockcrusher; and stm'ageflbins or receivers for the material separated bythe screen. The front steering wheels?) su,(- :h as the tractor isordinarily providealim h, are suitably supported at the forward ends ofthelsill pieces The axle or swiveled support for these wheels iscomiected with the steering mechanism 0 by links or cables 3 or othersuitable con PROCESS OF'AlilD APPARATUS FOR MAKING ROADS. l

Specification of Letters Patent. Patent d N v. 28, 1916. Applicationfiled August 28, 1 915. Seria1No.47 ,842.

the attendant and driver will usually be stationed, The rock crusher isdriven from the fly wheel (.Z of the tractor. a belt l uniting suchwheel with a pulley 5 upon the main driven shaft .6 of the rock crusher.l The product of the stone crusher B drops into a. receiver 7 from whichit is taken by aconveyer 9 to the screen or separator C, where itisseparated 'intoy jreferably, two grades,'co arse material suitable,for the foundation and main bodyof'the road bed,.

.and fine material adaptdto serve as a top dressinga nd"coatingtherefor. The separator Cmay be of any SllltilblBOl' preferred kind. Ihave" represented it as consisting ofa rotary screen 10 in which isarranged a screw oraworm conveyer 11 adapted to 'positivelyfforce the.material delivered to the screen throughlfit lengtl'iwise, regardless ofthe grade or incline on which the apparatus may be working. The screenisdriven from theengine of the tractor. ,lVhile I havenotfillustrated thedriving gearin detail, I have indicated. thatthe lower shaft 8 of theconyeyer 9 is belted to the shaft 6 of the rock crusher, and also to ashaft 12 at the'head end of the conveyer, which shaft, through gearing1.3, drives the? separator.

The coarse n iater-ial that does not pass. through the screen isforcedout through the delivery 'end thereof and received upon a chute orconveyer '14 that delivers to a receiving and collecting receptacle 15.This receptacle is supported in suitable framework carried bythesupporting and steering wheels band the sill pieces2 of the frame---work.'. Itterminates in a delivery spout 17 extending transverselyacross the track of the apparatus. This spout is preferably relativelynarrow, considered on lines fore and aft of the apparatus, but is ofa'width cor-- responding with-the width of the sheet ofrockmaterialtha't is to be delivered by the ED ST T S PATENT OFFICE. j

machine at one time. This latter dimension prevent'an undesirably freedeliveryof the material from the receptacle 15., The rear i edge does'not extend quiteso low as the.

to .the surface of the ground and-serves to,

front edge and determines the thickness of the layer of rockdelivered.besides operating as a leveling device for the upper surfacethereof. It is preferably adjustable. by means of a rack and pinion, l6,permitting a greater or less thickness of rock to be delivered as may bedesired.

The spout-section 17 of the receiving and collecting receptacle 15isprefcrably easily removable, being united with the main portion of thereceptacle by bolts 20. The spout will usually be removed when theapparatus is not in use, es .cially when it is moving from place to pace, in order to prevent it from being broken by engagement with objectsprojecting from the surfaceof the ground. i I

The fine material that passes through the screen is collected by acasing or jacket 21 that preferably completely surrounds the screencircumferentially, and is .formed with'an inclined bottom 22 leading toa spout 23 that is located laterally to one side of the apparatus so asto discharge outside of the roadway being produced, that is, be-

- yond the side edge of the crushed rock layer being delivered by thespout 17. The outer end 24 of this spout is preferably verticallydisposed and is adapted to have applied to it a telescopic extension 25,the delivery end of which is ,close to the surface of the ground. Thesection 25 is preferably supported by wheels 26, so that/it is free tomove upward and downward and thus follow the surface of thcground overwhich it passes. Its rear wall is preferably vertically adjustable sothat the flow of material may be regulated, there being adjustingdevices 28 provided for regulating and setting this spout at will.

in using an apparatus such as described for building a roadway, it istaken to the place of beginning the desired improvement. when the engineof the tractor is started. being disconnected from the traction wheels(1, but in driving connection with the rock crusher. Suflicient rock isthen crushed to fill the receptacles 15 and 23, whereupon the engine isconnected with the traction wheels and the apparatus slowly moved overthe roadway. The. separator C and the adjacent parts are the, advanceelements of the apparatus. so that the layer of coarse crushed rock. I).that is laid upon the prepared earth surface is rolled and compacted bythe tractor which immediately follows. As will be: seen. the deliveryspouts 17 and 25 are open-ended. and are supported so that their endsare quite, close to the surface of the ground. in order" that. thoughthe hoppers or receptacles with which they communicate may be filled.material does' not flow out therefrom to any considerable extent exceptas the machlne is advanced, when the former produces the sheet or layerone side of the layer I) on the roadway. and the latlcr delivers theline material I; alongside the l'(ulll\ ':l and in position to beconveniently applied to the surface of the roadway al'lcr (lulaycr I)has been filled and compacted.

lt will be seen by reference to Fig. 2 lhal the open end of the spout 1Tinclines downwardly each way from its center. this for mation being;adopted inordcr to give a desired crown to the roadway being produced.If the crusher does not produce broken stone rapidly enough lo properlysupply the spout 17 as it is being advanced by the. tractor. as will hethe case unless the apparatus is propelled much more slowly than theordinary speed of a traction cnine. the latter is stopped when thesupply rom the lbceptaclc 15 is exhausted or nearly so. and remains atrest until the hopper is again filled. when the apparatus 86 is advancedanother stage.

It will be seen that the apparatus which I have invented and which isherein described, will operate positively on any grade; and that a roadbed with a rock body of' any desired thickness may be produced thereby.vregardless of the character of rock being: en1ploycd.-some kinds ofwhich are reduced more rapidly than others by the crusher as is wellknown.-by reason of the interposition of the storage receptacle 15,where a supply of crushed rock may be accumulated while the apparatus an whole is standing still and from which the rock is delivered to theroadwav and spread in a uniform sheet thereon as soon asthe apparatus isadvanced.

Vhat I claim is:-

1.. A road building apparatus comprising mechanism for crushing rock.means for I" separating the crushed rock into relatively .coarse andfine material. means for deliveringthe coarse'material in asubstantially uniform sheet on the road surface as the apparatus iscaused totmverse the roudway, and means for delivering the separatedfine material laterally to one side of the sald sheet of coarse materialand in position to be conveniently applied thereto subsequently. Ill 2.A rpnd building apparatus comprising in combination a tractor forrollingand compacting the road surface. a rock crusher,

a screen for the product of the rock crusher. means for driving the rockcrusher and the screen from the engine of the tractor. a receptacle inwhich the course material from the screen is accumulated. meansfordelivernig the material from the said receptacle and spreading it in alayer as the apparatus is advanced. and means for delivering the finematerial from the screen laterally at of coarse material in a. positionto be conveniently applied to the surface of the latter by hand, thesaid parts ranged to spread the being: connected so as to be'propelledas"a unitary apparatus by the tractor.

3: A road building a ppa 'atus comprising in combination a tractor, arock crusher; a screen for the product of therock crusher, means fordriving the rock crusher screen from the engine otthe tractor, arematerial from the screen is acciunulatul, and a spout through, whichthe material from the said receptacle is delivered to the roadwayarmaterial m a umtorm' la \'er, the spout. being: adjustable toward andfrom the surface of the ground. the said parts beingconnected so as tobe propelled as a unitary apparatus by the tractor.

4:. A road building appayatus comprising, in combination a tractor a'rock crusher, a screen for the product or the rock crusher. means fordriving the rock crusher and the screen from the engine of the tractor,means .for taking the coarse-material from the screen and delivering itin a layer upon the road surface. and means extending laterally to oneside of the apparatus and arranged to receive the fine material from thescreen and deliver it laterally beyond the layer of coarse material. thesaid parts being connected so as to be propelled .as a unitary apparatusby the tractor.

A road building apparatus comprising in combination a tractor, a rockcrusher, a

means for .elriving the rock crusher and the and receiving;-

, screen for the product of the rock and the screen from the engineot'the tractor, a receptacle in Which the coarse material from the screenis accumulated, means for delivering the material from the saidreceptacle and spreading it in a layer as the apparatus is advanced, ajacket surrounding the screen the fine material therefrom, and alaterally disposed delivery spout for discharging the said fine materialatone side of the layer of coarse material, the said partsbeingconnected so as to be propelled as a unitary apparatus by the tractor.

6. k road buildiii'i apparatus comprising in combination a rock crusher,a rotary screen for the product of the rock crusher in which is arrangeda screw conveyer for positively forcing the material through the screenregardless ot' the grade on which the apparatus may be operating, meansfor driving: the rock crusher and the-screen from the engine of'thetra'ctor, receptacles in which the coarse material and the finematerial, separated from each other by the screen, are respectivelystored, and means for delivering the coarse material from its storagerecap tacle over the road surface being produced, and means fordelivering the fine material from its storage'receptacle to one sid'e ofthe roadway. v

" JAMESD. CLARKS ON.

crusher,

